CMDS = {0x50: ['Standard Message Received', 0, 11,],
        96  : ['GetImInfo',                 2, 9, ],
        98  : ['SendMessage',               8, 9, ],
        109 : ['LedOn',                     2, 3, ],
        110 : ['LedOff',                    2, 3, ],        
        }
                #cmd1,  meaning          cmd2, meaning,  response 
STANDARD_CMDS = {
                 0x17: [ 'ON',           0,    'Level',                                 0x50],
                 0x19: [ 'GetStatus',    0,    'Request on-level status from a unit.',  0x50],
                 }